EP2025565A1 - Haubenaufklappsystem - Google Patents

Haubenaufklappsystem Download PDF

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Publication number
EP2025565A1
EP2025565A1 EP08014301A EP08014301A EP2025565A1 EP 2025565 A1 EP2025565 A1 EP 2025565A1 EP 08014301 A EP08014301 A EP 08014301A EP 08014301 A EP08014301 A EP 08014301A EP 2025565 A1 EP2025565 A1 EP 2025565A1
Authority
EP
European Patent Office
Prior art keywords
hood
oscillation
offsetting
restricting
force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08014301A
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English (en)
French (fr)
Other versions
EP2025565B1 (de
Inventor
Nobuhiro Iwai
Toshihiro Yoshitake
Yusuke Inomata
Kazuo Hoshino
Mitsuo Ehama
Yasuhiro c/o Nissan Motor Co. Ltd. Miyata
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of EP2025565A1 publication Critical patent/EP2025565A1/de
Application granted granted Critical
Publication of EP2025565B1 publication Critical patent/EP2025565B1/de
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
    • B60R21/38—Protecting non-occupants of a vehicle, e.g. pedestrians using means for lifting bonnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
    • B62D25/12—Parts or details thereof

Definitions

  • the present invention relates to a hood pop-up system.
  • a hood pop-up system raises upwards (pops up) the hood of the engine compartment.
  • Japanese Patent Application Laid-open Publication No. 1,1-198860 discloses such a hood pop-up system, in which a wire is provided to connect a rear-end portion of the hood to a vehicle body member. The wire bends the rear-end portion of the hood down to reduce the length of the backward protrusion of the hood, whereby the windshield glass gets broken less easily than otherwise, even when the front windshield glass is hit by the rear-end portion of the hood.
  • hood pop-up system such as one described above
  • the hood is popped up by activating an actuator.
  • the popping-up of the hood sometimes causes oscillation of the hood.
  • the displacement of the oscillating hood, the phase of the oscillation and other factors change the impact force given, to the hood, by the object that collides with the hood.
  • the impact force given by the colliding obj ect to the hood may possibly increase.
  • a part of the oscillating hood is moving downwards when the object collides with the top surface of the part of the oscillating hood.
  • the space left between the hood and the structural assemblies positioned below the hood becomes smaller, and the hood may possibly collide with the structural assemblies. For this reason, a problem arises from the occurrence of such oscillation of hood. Specifically, the oscillation makes the designing of the hood into a complicated task.
  • the present invention aims to provide a hood pop-up system that is capable of offsetting effectively the oscillation of the popped-up hood.
  • An aspect of the present invention is to provide a hood pop-up system for a vehicle that pops up a hood of the vehicle when detecting or predicting a collision of the vehicle.
  • the hood pop-up system includes an oscillation-offsetting unit which offsets and reduces oscillation of the hood caused by the popping-up of the hood.
  • Fig. 1 illustrates a hood pop-up system 1A according to a first embodiment of the present invention.
  • Fig. 1 is a side view (partially sectional view) of a popped-up hood 4 in the front portion of a vehicle.
  • front side members 7 are disposed on the two sides, in the vehicle-width direction, of an engine compartment 3, respectively.
  • the front side members 7 extend in the front-and-rear direction of the vehicle (in the right-and-left direction in Fig. 1 ).
  • Hood ridge members 2 extend above the respective right and left front side members 7, and are parallel to each other.
  • Dash side panels 8 are provided to cover the respective ones of the hood ridge members 2 from the outer sides in the vehicle-width direction.
  • Linking members 2a are provided in the respective ones of the front-end portions of the hood ridge members 2. Each linking member 2a links the front-end portion of the hood ridge member 2 and the corresponding one of the front side members 7 on each side of the vehicle body.
  • a radiator core support 9 is disposed in the front part of the engine compartment 3. Though not illustrated, a radiator, a radiator fan, and other members are attached to the radiator core support 9.
  • a hood 4 is provided to open and close the upper opening of the engine compartment 3.
  • the hood 4 has a double-layered structure including a hood outer panel 4a that forms the top surface of the hood 4 and a hood inner panel 4b that forms the lower surface thereof.
  • the two panels 4a and 4b together form a closed section.
  • the two panels 4a and 4b are lapped over each other, and the hemmed peripheral portions of the two panels are bonded together (hem bonding).
  • the hood pop-up system 1A is disposed between a rear-end portion 4E of the hood 4 and the hood ridge members 2.
  • the hood pop-up system 1A includes hood hinges 5 and actuators 6.
  • Each of the actuators 6 includes an air cylinder.
  • the actuators 6 are shortened in normal times (in a non-collision state), and are housed in the respective spaces formed between the closed hood 4 and the corresponding hood ridge members 2.
  • the hood hinges 5 are provided as a right and left pair so as to correspond to the right and the left hood ridge members 2.
  • Each of the hood hinges 5 includes a vehicle-body-side attachment member 5a that is fixed onto the top surface of the corresponding one of the hood ridge members 2 and a hood-side attachment member 5b that is fixed onto the hood inner panel 4b.
  • a lower link arm 5d is provided with a first one of its two ends connected to the vehicle-body-side attachment member 5a with a pin 5c, and the lower link arm 5d thus connected is capable of moving rotationally about the pin 5c.
  • An upper link arm 5f is also provided with a first one of its two ends connected to the hood-side attachment member 5b with a pin 5e, and the upper link arm 5f thus connected is capable of moving rotationally about the pin 5e.
  • the second end of the lower link arm 5d is connected to the second end of the upper link arm 5f with a pin 5g, so that both the lower link arm 5d and the upper link arm 5f can move rotationally about the pin 5g.
  • the lower link arm 5d and the upper link arm 5f are capable of being folded up or stretched out in a space between the vehicle-body-side attachment member 5a and the hood-side attachment member 5b.
  • the lower link arm 5d and the upper link arm 5f are folded up, and the vehicle-body-side attachment member 5a and the hood-side attachment member 5b are proximate to each other.
  • the hood 4 can move rotationally about the hood hinge 5, so that the front-end portion of the hood 4 can be opened and closed.
  • a hood lock 10 is disposed between the front-end portion of the hood 4 and the upper central portion of the radiator core support 9. Unlocking the hood lock 10 allows the front-end portion of the hood 4 to be opened.
  • the controller activates the actuator 6 on detecting or predicting the occurrence of a collision.
  • the actuator 6 extends instantaneously to become the state as shown in Fig. 1 .
  • the extension of the actuator 6 is accompanied by the stretching-out of the lower link arm 5d and the upper link arm 5f of the hood hinge 5.
  • the hood 4 is moved rotationally about the hood lock 10, and the rear-end portion of the hood 4 is popped up.
  • the oscillation-offsetting unit 20A restricts the upward movement of the popped-up hood 4 relative to the vehicle body, so as to give the hood 4 offsetting oscillation that offsets and reduces the oscillation caused by the popping-up of the hood 4.
  • Figs. 2A and 2B are side views of one of the identical hood hinges 5.
  • the hood hinge 5 shown in Fig. 2A is in the stretched-out state.
  • the hood hinge 5 shown in Fig. 2B is being stretched out.
  • Fig. 3 is a perspective view illustrating the stretched-out hood hinge 5 when viewed from the front side thereof.
  • the hood hinge 5 is provided with a stopper mechanism 24 that is disposed between the lower link arm 5d and the upper link arm 5f.
  • the stopper mechanism 24 is used as the oscillation-offsetting unit-20A.
  • the stopper mechanism 24 is composed of a flange portion 24a and a stopper portion 24b.
  • the stopper portion 24b is formed in the perimeter of the lower link arm 5d. In the radial direction of the pin 5g, the position where the stopper portion 24b is formed is substantially the same as the position of the flange portion 24a.
  • the stretching-out of the hood hinge 5 along with the popping-up of the hood 4 makes a side surface of the flange portion 24a abut on the stopper portion 24b.
  • the abutting actually takes place, when the hood hinge 5 reaches the vicinity of its top dead center (hood-pop-up termination position) as shown in Fig. 2A and Fig.3 .
  • This engagement between the flange portion 24a and the stopper portion 24b restricts the upward movement of the hood 4.
  • the stopper mechanism 24 applies the restricting force to hood 4.
  • the restricting force causes a displacement of the hood 4 in a direction opposite to the direction of the oscillation displacement of the oscillation caused by the popping-up of the hood 4.
  • a hood pop-up position i.e., a predetermined raised position of the popped up hood 4 with respect to the normal position of the hood 4 in normal times
  • the stopper mechanism 24 applies the restricting force in a downward direction that is produced by restricting the upward movement of the popped-up hood 4.
  • the stopper mechanism 24 serves as the oscillation-offsetting unit 20A in this embodiment.
  • the flange portion 24a when the flange portion 24a is engaged with (abuts on) the stopper portion 24b, the flange portion 24 deforms. The deformation of the flange portion 24a allows the restricting force--and eventually the offsetting oscillation--to be adjusted. Accordingly, the flange portion 24a serves as a restricting-force adjustment mechanism 30A in this embodiment.
  • Figs. 5A to 5D and Figs. 6A to 6C illustrates how the oscillation of the hood 4 is offset and thus reduced by the interference with the offsetting oscillation in the direction opposite to the direction of the oscillation of the hood 4.
  • the application of the offsetting oscillation starts at the offsetting start time A.
  • the solid line represents the oscillation of the hood 4 caused by the popping-up of the hood 4 (this oscillation is referred to as the original oscillation).
  • the broken line represents the offsetting oscillation produced by the oscillation-offsetting unit 20A (this oscillation is referred to as the offsetting oscillation).
  • the thick solid line represents the composite oscillation or combined oscillation of the original oscillation and the offsetting oscillation.
  • the initial oscillation (the original oscillation) is assumed to be a simple harmonic oscillation with a sinusoidal waveform, and the amplitude and the period of the offsetting oscillation are assumed to be identical to those of the original oscillation.
  • Figs. 5B to 5D concern the cases where the offsetting start time A is made earlier than the offsetting start time A in the case of Fig. 5A.
  • Fig. 5D shows the waveform of a case where the offsetting start time A is earlier by ⁇ /2 than 2n ⁇ .
  • the phase angle ⁇ 2n ⁇ - ⁇ /2.
  • the amplitude of the composite oscillation is identical to the amplitude of the original oscillation.
  • the phase angle ⁇ at the time of applying the offsetting oscillation is earlier than 2n ⁇ - ⁇ /3
  • the amplitude of the composite oscillation becomes larger than the amplitude of the original oscillation. That is, no offsetting effect is observed.
  • Figs. 6A to 6C concern the cases where the offsetting start time A is made later than the offsetting start time A in the case of Fig. 5A .
  • Fig. 6C shows the waveform of a case where the offsetting start time A is later by ⁇ /2 than 2n ⁇ .
  • the phase angle ⁇ 2n ⁇ + ⁇ /2.
  • the amplitude of the composite oscillation is identical to the amplitude of the original oscillation.
  • the phase angle ⁇ at the time of applying the offsetting oscillation is later than 2n ⁇ + ⁇ /3
  • the amplitude of the composite oscillation becomes larger than the amplitude of the original oscillation. That is, no offsetting effect is observed.
  • the phase angle ⁇ at the time of applying the offsetting oscillation is earlier than 2n ⁇ + ⁇ /3
  • the amplitude of the composite oscillation becomes smaller than the amplitude of the original oscillation. That is, a certain offsetting effect is observed.
  • the original oscillation of the hood 4 can be offset and thus reduced by the oscillation-offsetting unit 20A which applies a restricting force to the hood 4 that gives displacement in the direction opposite to the direction of the displacement of the original oscillation caused by the popping-up of the hood 4.
  • the oscillation-offsetting unit 20A having a relatively simple structure.
  • the oscillation-affsetting unit 20A produces the restricting force in the downward direction by restricting the upward movement of the popped-up hood 4 relative to the vehicle body.
  • the oscillation-offsetting unit 20A applies the downward restricting force to the hood 4 positioned at the hood pop-up position, at the time when the hood 4 has an upward displacement in the original oscillation caused by the popping-up of the hood 4.
  • the oscillation-offsetting unit 20A having a relatively simple structure.
  • the hood hinge 5 can be provided with the oscillation-offsetting unit 20A and the restricting-force adjustment mechanism 30A.
  • the configuration of the system as a whole can be made simpler and more compact in size.
  • the production cost for the system can be reduced.
  • a preferable time for the same purpose is when the phase angle ⁇ of the original oscillation of the hood 4 is later than 2nn minus n/3 and, at the same time, is earlier than 2n ⁇ plus n/3 (i.e., 2nn - ⁇ /3 ⁇ ⁇ ⁇ 2nn + ⁇ /3). Effective offsetting and reduction of the original oscillation can be achieved in this way.
  • FIG. 4 is an enlarged side view illustrating a modified example of the stopper mechanism 24 provided in the hood hinge 5.
  • a stopper mechanism 25 according to this modified example includes two tongue-shaped pieces 25b and 25c arranged in line with each other on the perimeter of the leading-end portion of the upper link arm 5f (side by side with each other in the circumferential direction of the perimeter).
  • a stopper portion 25a is formed on the perimeter of the leading-end portion of the lower link arm 5d.
  • the tongue-shaped piece 25b which abuts on the stopper portion 25a earlier than the tongue-shaped piece 25c does, is allowed to be plastically deformed by the abutting.
  • the tongue-shaped piece 25c which comes next, is designed to have a higher rigidity than that of the tongue-shaped piece 25b.
  • the engagement of the rigid tongue-shaped piece 25c with the stopper portion 25a is the ultimate means for restricting the stretching-out of the hood hinge 5.
  • the tongue-shaped piece 25b serves as a restricting-force adjustment mechanism 30B
  • the stopper mechanism 25 serves as an oscillation-offsetting unit 20B.
  • the original oscillation produced when the hood 4 is popped up can be effectively offset and thus reduced by offsetting oscillation as in the case of the first embodiment.
  • the hood hinge 5 is provided with the oscillation-offsetting unit 20B and the restricting-force adjustment mechanism 30B, the configuration of the system as a whole can be simplified and be made compact in size. Moreover, the production cost for the system can be reduced.
  • Fig. 7 illustrates a hood pop-up system 1C according to a second embodiment of the present invention.
  • An oscillation-offsetting unit 20C illustrated in Fig. 7 includes a wire 20c that is disposed to connect the hood 4 to the hood ridge member 2, which is a part of the vehicle body. Also included is a piston 20a to which an end of the wire 20 is fixed. The piston 20a is installed in a cylinder 20b, which is also included in the oscillation-offsetting unit 20C.
  • the basic mechanism of the oscillation-offsetting unit 20C is as follows.
  • the wire 20c is used to restrict the movement (the popping-up action) of the hood 4.
  • the force exerted on the hood 4 by the wire 20c against the inertia of the hood 4 (the force is an impact force) is used to produce offsetting oscillation.
  • the force is an impact force
  • the timing when the offsetting oscillation is given to the hood 4 (offsetting start time A) can be adjusted by changing the length of the wire 20c, for example.
  • the oscillation-offsetting unit 20C includes a restricting-force adjustment mechanism 30C that adjusts the restricting force given to the hood 4.
  • the restricting-force adjustment mechanism 30C makes use of the viscous resistance of a fluid.
  • a viscous fluid is filled in the cylinder 20b where the piston 20a is installed while the cylinder 20b is fixed onto the hood ridge member 2.
  • the wire 20c is fixed to the piston 20a. Accordingly, a fluid drag acts on the hood 4 when the piston 20a moves (rises, in this second embodiment) inside the cylinder 20b.
  • Use of such a restricting-force adjustment mechanism 30C allows appropriate adjustment for the shape of the temporal waveform of the offsetting oscillation (the rise of the waveform) and for the amplitude of the offsetting oscillation.
  • the force application point P of the restricting force acting on the hood 4 is set within a region on the hood 4 having substantially the same phase of oscillation as the phase of oscillation in the vicinity of the contact point Q between the actuator 6 and the hood 4, the offsetting and reducing of the original oscillation can be more effective.
  • the oscillation-offsetting unit 20c of this second embodiment includes: the wire 20c connecting the hood 4 to the hood ridge member 2, which is a part of the vehicle body; the piston 20a to which an end of the wire 20c is fixed; and the cylinder 20b in which the piston 20a is installed.
  • the basic mechanism of the oscillation-offsetting unit 20C uses the wire 20c to restrict the upward movement (the popping-up action) of the hood 4 relative to the vehicle body.
  • the force exerted on the hood 4 by the wire 20c against the inertia of the hood 4 (the force is an impact force) produces the offsetting oscillation. Accordingly, the oscillation-offsetting unit 20C can be formed to have a relatively simple configuration.
  • the restricting force applied from the oscillation-offsetting unit 20C is made adjustable by making use of the resistance of the fluid, whereby the effective offsetting and reduction of the original oscillation can be achieved also in this second embodiment.
  • Fig. 8 illustrates a third embodiment of the present invention.
  • Fig. 8 is a side view (partially sectional view) of the popped-up hood 4 in the front portion of a vehicle.
  • the wire 21 is disposed to connect the hood ridge member 2 and the hood 4, so as to serve as an oscillation-offsetting unit 20D.
  • the wire 21 connects a point P on the side of the hood 4 with another point R on the side of the hood ridge member 2.
  • the wire 21 is designed to serve not only as the oscillation-offsetting unit 20D but also as a restricting-force adjustment mechanism 30D. This two-way use of the wire 21 distinguishes this third embodiment from the above-described second embodiment.
  • the deformation of the wire 21 is used to adjust the absolute value of integral over a predetermined time interval of the oscillation displacement of the offsetting oscillation that is produced by the restriction exerted by the wire 21 on the movement of the hood 4.
  • the absolute value of the integral of the offsetting oscillation is adjusted to be close to the corresponding absolute value of the integral of the oscillation displacement of the original oscillation of the hood 4.
  • the original oscillation produced when the hood 4 is popped up can be effectively offset and thus reduced as in the case of the first and the second embodiments.
  • the wire 21 is used not only as the oscillation-offsetting unit 20D but also as the restricting-force adjustment mechanism 30D, the configuration of the system as a whole can be simplified. In addition, the production cost for the system can be reduced.
  • Both of Figs. 9A and 9B illustrate a fourth embodiment of the present invention, and are enlarged sectional views of the hood 4 and the leading-end portion of the actuator 6.
  • the hood 4 illustrated in Fig. 9A is in a state of being popped up by the upper end of the actuator 6 while the hood 4 illustrated in Fig. 9B is in a state where the movement of the hood 4 is restricted by the upper end of the actuator 6.
  • a collar 6k is formed, as an oscillation-offsetting unit 20E, in the leading-end portion (upper-end portion) of a rod of the actuator 6 so as to extend in the radial direction.
  • the upper-end collar 6k is not fixed onto the lower surface of the hood inner panel 4b, but is made to abut on the lower surface of the hood inner panel 4b.
  • a stopper surface 4c is provided below the hood inner panel 4b while a certain predetermined distance D is left between the stopper surface 4c and the lower surface of the hood inner panel 4b.
  • the distance D is designed to be larger than the thickness of the collar 6k (i.e., D> T).
  • Fig. 10 and Fig. 11 illustrate a fifth embodiment of the present invention.
  • Fig. 10 is a side view (partially sectional view) of the popped-up hood 4 in the front portion of a vehicle.
  • Fig. 11 is a sectional view illustrating an internal structure of an actuator 6F.
  • the actuator 6F disposed in a hood pop-up system 1F is provided with an oscillation-offsetting unit 20F and a restriction-force adjustment mechanism 30F.
  • both an actuator 6FA shown in Fig. 11A and an actuator 6FB shown in Fig. 11B can be used as the actuator 6F.
  • Each of the actuators 6FA and 6FB has a telescopic construction with cylinders 6c1, 6c2, and 6c3 ..., each of which has a flange to restrict the extension of the actuators 6FA and 6FB, and thereby restricts the movement of the hood 4.
  • EA materials 22 energy-absorbing materials 22 are set between the cylinders 6c1 and 6c2 as well as between the cylinders 6c2 and 6c3.
  • the EA materials 22 are made to be compressed and thus deformed as the actuator 6FA is extending.
  • the restricting force and eventually the offsetting oscillation can be adjusted by changing such conditions as whether the energy-absorbing materials 22 are provided between the corresponding cylinders or as specifications of the energy-absorbing materials 22.
  • each of the cylinders 6c1, 6c2, and 6c3 ... is formed in a tapered shape.
  • a frictional force is produced between the piston of the cylinder 6c1 and the inner surface of the cylinder 6c2.
  • another frictional force is produced between the piston of the cylinder 6c2 and the inner surface of the cylinder 6c3.
  • the restricting force and eventually the offsetting oscillation can be adjusted by changing such conditions as the slope angle of each tapered surface or as the strokes of the pistons to slide on the inner surfaces of the corresponding cylinders.
  • Fig. 12 illustrates a sixth embodiment of the present invention.
  • Fig. 12 is a side view (partially sectional view) of the popped-up hood 4 in the front portion of a vehicle.
  • a cylinder apparatus 23 is provided to serve both as an oscillation-offsetting unit 20G and as a restricting-force adjustment mechanism 30G.
  • the cylinder apparatus provided to this end has a similar configuration to that of the actuator 6, but is installed upside down.
  • the cylinder apparatus 23 is fixed both to the hood ridge member 2 and the hood inner panel 4b. In normal times, that is, when the hood 4 is closed, the cylinder apparatus 23 is shortened and is installed in the interstice between the closed hood 4 and the hood ridge member 2. The cylinder apparatus 23 is designed to extend along with the popping-up of the hood 4.
  • Figs. 13A to 13E and Figs. 14A to 14D are views illustrating modified examples of the restricting-force adjustment mechanism.
  • a restricting-force adjustment mechanism 30H shown in Fig. 13A includes an EA (energy-absorbing) material 26.
  • EA material 26 polypropylene (PP) pad formed of PP foam or the like is used.
  • the EA material 26 is attached onto the lower surface of the hood ridge member 2.
  • a wire 26a attached to the hood 4 is connected to a base plate 26b that covers the lower surface of the EA material 26. When the hood 4 is popped up, the wire 26a pulls upwards the base plate 26b. The pulled-up base plate 26b compresses the EA material 26, and the compression in turn is used to adjust the restricting force.
  • a restricting-force adjustment mechanism 30I shown in Fig. 13B includes a hollow body 27.
  • the hollow body 27 is attached to the lower surface of the hood ridge member 2, and a wire 27a attached to the hood 4 is inserted into the hollow body 27.
  • the wire 27a is fixed to a lower portion of the hollow body 27. While the wire 27a is pulled up by the popping-up of the hood 4, the pulled-up wire 27 crushes the hollow body 27. The crushing deformation of the hollow body 27 is used to adjust the restricting force.
  • the cross-sectional shape of the hollow body 27 is not limited to circular ones. Instead, the hollow body 27 may have rectangular cross-sectional shapes or any other polygonal shapes.
  • a restricting-force adjustment mechanism 30J shown in Fig. 13C includes a hollow pipe 28.
  • the hollow pipe 28 is set upright in the vertical direction, and is attached to the lower surface of the hood ridge member 2.
  • a wire 28a attached to the hood 4 is inserted into the inside of the hollow pipe 28.
  • the wire 28a is fixed to the bottom surface of the hollow pipe 28.
  • the wire 28a is pulled up by the popping-up of the hood 4, and the pulled-up wire 28a crushes the hollow pipe 28 in the axial direction thereof. The crushing deformation is in turn used to adjust the restricting force.
  • a restricting-force adjustment mechanism 30K shown in Fig. 13D includes a crush box 29 with a cross-sectional shape of an inverted trapezoid.
  • the crush box 29 is attached to the lower surface of the hood ridge member 2.
  • a wire 29a attached to the hood 4 is connected to the lower surface of the crush box 29.
  • the wire 29a is pulled up by the popping-up of the hood 4, and the pulled-up wire 29a crushes the crush box 29.
  • the crushing deformation is in turn used to adjust the restricting force.
  • a restricting-force adjustment mechanism 30L shown in Fig. 13E includes a combination 33 of a hollow pipe 33a and a wire 33b that is wrapped around the outer side-surface of the hollow pipe 33a so as to form a spiral shape.
  • the hollow pipe 33a is set upright in the vertical direction, and is attached to the lower surface of the hood ridge member 2.
  • the wire 33b is attached to the hood 4.
  • the wire 33b is pulled up by the popping-up of the hood 4, and the pulled-up wire 33b tightens up and crushes the hollow pipe 33a. The crushing deformation is in turn used to adjust the restricting force.
  • the elastic and/or plastic deformation of the respective wires 26a, 27a, 28a, 29a, and 33b per se can also be used to adjust the restricting force.
  • a restricting-force adjustment mechanism either includes an elastoplastic deformation body 31 alone, which produces a resistive force by using elastic deformation and/or plastic deformation, or a combination of an elastoplastic deformation body 31 with at least one viscous drag generating body 32 that produces a resistive force by using viscous drag.
  • the elastoplastic deformation body 31 includes a wire and that the viscous drag generating body 32 includes a dashpot (i.e., a structure such as the one in the second embodiment that includes: a cylinder 20b filled with a fluid; and a piston 20a sliding inside the cylinder 20b).
  • a restricting-force adjustment mechanism 30M shown in Fig. 14A includes an elastoplastic deformation body 31, but not a viscous drag generating body 32.
  • a restricting-force adjustment mechanism 30N shown in Fig. 14B includes both an elastoplastic deformation body 31 and a viscous drag generating body 32 that are arranged in parallel to each other.
  • a restricting-force adjustment mechanism 30P shown in Fig. 14C includes both an elastoplastic deformation body 31 and a viscous drag generating body 32 that are arranged in line with each other.
  • a restricting-force adjustment mechanism 30Q shown in Fig. 14D includes an elastoplastic deformation body 31 and two viscous drag generating bodies 32.
  • One of the two viscous drag generating bodies 32 is arranged in parallel to the elastoplastic deformation body 31, and these two bodies 31 and 32 that are in parallel to each other is together arranged in line with the other one of the two viscous drag generating bodies 32.
  • hood hinge described in the embodiment are not the only possible forms thereof.
  • a possible structure to be used as a hood hinge has only to be capable of being the rotational center of the rotational movement of the hood in normal times and of functioning as an apparatus for popping up the hood when a collision occurs.
  • the present invention also includes appropriate combinations of the above-described embodiments. The scope of the invention being indicated by the claims, and all variations which come within the meaning of claims are intended to be embraced herein.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Superstructure Of Vehicle (AREA)
  • Vibration Prevention Devices (AREA)
  • Vibration Dampers (AREA)
EP08014301.9A 2007-08-14 2008-08-11 Haubenaufklappsystem Ceased EP2025565B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007211270A JP5239253B2 (ja) 2007-08-14 2007-08-14 フード跳ね上げ装置

Publications (2)

Publication Number Publication Date
EP2025565A1 true EP2025565A1 (de) 2009-02-18
EP2025565B1 EP2025565B1 (de) 2018-10-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08014301.9A Ceased EP2025565B1 (de) 2007-08-14 2008-08-11 Haubenaufklappsystem

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US (1) US8311701B2 (de)
EP (1) EP2025565B1 (de)
JP (1) JP5239253B2 (de)
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WO2012112093A1 (en) * 2011-02-18 2012-08-23 Autoliv Development Ab Hood lifting arrangement and method for lifting a hood
EP3098117A4 (de) * 2014-01-20 2017-02-08 Toyota Jidosha Kabushiki Kaisha Haubenaufklappvorrichtung für ein fahrzeug

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CN102582568B (zh) * 2011-01-17 2015-12-16 奥托立夫开发公司 用于抬起机动车辆车身件的装置
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US8763744B2 (en) * 2012-01-26 2014-07-01 Fuji Jukogyo Kabushiki Kaisha Vehicle hood moving device
KR101491310B1 (ko) * 2013-09-04 2015-02-06 현대자동차주식회사 차량용 후드 장치
JP6193109B2 (ja) * 2013-12-11 2017-09-06 ヤンマー株式会社 作業車両
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JP6245235B2 (ja) * 2015-08-21 2017-12-13 トヨタ自動車株式会社 車両用ポップアップフード装置
JP6732423B2 (ja) * 2015-09-30 2020-07-29 住友建機株式会社 ショベル
US10315612B2 (en) * 2016-08-24 2019-06-11 Honda Motor Co., Ltd. Vehicle hood lift system
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EP2213528A3 (de) * 2009-01-28 2010-09-29 Bayerische Motoren Werke Dämpfungseinrichtung an einer Frontklappe eines Kraftfahrzeugs
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CN102490677A (zh) * 2011-12-19 2012-06-13 袁玉君 一种汽车安全防护系统
EP3098117A4 (de) * 2014-01-20 2017-02-08 Toyota Jidosha Kabushiki Kaisha Haubenaufklappvorrichtung für ein fahrzeug

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JP2009045965A (ja) 2009-03-05
US20090048734A1 (en) 2009-02-19
CN101367411A (zh) 2009-02-18
US8311701B2 (en) 2012-11-13
EP2025565B1 (de) 2018-10-10
JP5239253B2 (ja) 2013-07-17
CN101367411B (zh) 2011-07-06
KR20090017432A (ko) 2009-02-18

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